Upper grate section for sliding cast iron grate assembly



FIG. 1 is a front perspective view, as seen from above, of an upper grate section for a sliding cast iron grate assembly, embodying my new design;

FIG. 2 is a rear perspective view thereof, as seen from below;

FIG. 3 is a front elevation view thereof; and

FIG. 4 is a side elevation thereof, viewed from the right of FIG. 3. 

The ornamental design for an upper grate section for a sliding cast iron grate assembly, as shown and described. 